Search found 7 matches

by noldor
Sun Aug 20, 2017 6:11 am
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Re: Chr-Ram boards. What am i missing?

As far as I'm aware, it'll usually be a can boot/can't boot situation. In this test ROM, I took pains to make it keep doing something when the wrong bank is switched in (hence WB, LB, SU error codes). An incomplete ROM for a real game should just crash early on because hardware init code is left ou...
by noldor
Fri Aug 18, 2017 7:50 am
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Re: Chr-Ram boards. What am i missing?

hey, wait. I have been splitting the rom into 1Meg chr and prg but the 27c2001 is 2Megabits... I resoldered FF2 with at 2mbit flashed eprom and sure enough. When you said that i could not read the second bank and i looked at my last post i realised i have been treating the 27c2001 as a 1mbit rom.......
by noldor
Fri Aug 18, 2017 7:12 am
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Re: Chr-Ram boards. What am i missing?

The TNROM video is giving LB, which means trouble getting to the last bank. The SU code is similar. How are you splitting the PRG ROM from the header when programming the memory? (It might be easier to look up the dits and dahs in a Morse code chart than to post a video to YouTube.) Haha! Yea that ...
by noldor
Thu Aug 17, 2017 3:34 pm
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Re: Chr-Ram boards. What am i missing?

When Holy Diver Batman can't even ensure that it can draw to the screen, it falls back to beeping two or three letters in Morse code . The beeping here (... .._, dit dit dit - dit dit dah) is Morse code for SU, issued by finish_init_mmc1 in mapper_detect.s. This means the mapper detection portion o...
by noldor
Thu Aug 17, 2017 10:04 am
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Re: Chr-Ram boards. What am i missing?

Oops, realy sorry.
It should be available now.
Thank you again for the help and the patience. :D
by noldor
Thu Aug 17, 2017 8:56 am
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Re: Chr-Ram boards. What am i missing?

Hello Tepples. Thank you for the help. I burnt the holydiverbatman testrom to a chip and soldered it to the FF2 SN-ROM board pictured above in the exact same way that i had soldered FF2. I get a short morse code response. Excuse the low volume. https://www.youtube.com/watch?v=LfvPMpQwH5c&feature=you...
by noldor
Thu Aug 17, 2017 7:21 am
Forum: Reproduction
Topic: Chr-Ram boards. What am i missing?
Replies: 11
Views: 6502

Chr-Ram boards. What am i missing?

A big hello to all helpfull souls out there. :wink: I have started putting translation patches on most of my japanese games and also making a bunch of repros. I have made about 30 games so far. I have a 100% success-rate with sl-rom, tl-rom, nrom. My problem comes whenever a board uses chr-ram. Boar...